Malicious PDF — malware analysis report

Static analysis result for SHA-256 18060d3f333c5fa1…

MALICIOUS

PDF

88.4 KB Created: 2021-07-18 19:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9f78ceff699bc35bd620e555e2416a13 SHA-1: bc4cd3e0a4c99e6fc58704ca9659be6337757ee6 SHA-256: 18060d3f333c5fa1407f345ff3578b995d021a7cb2945cdb830ac271f1858728
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, forming a link farm. These links likely lead to further malicious content or phishing pages, indicating a phishing or malware distribution attempt. No scripts were extracted, but the structure suggests a lure to download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e835604952---zuxisikivudabewujuwisev.pdf In PDF document text
    • http://inventory-acepipe.com/images/uploads/files/36649310601.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607f57245bd32---gibesexigufixojupewew.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/vikuvabe.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/445b0ab5054c63fbfc448d6d42c79974/mopaxojipefo.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/19430153195.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/xeruvobevolesixuxewigu.pdfIn PDF document text
    • http://monroehighwildcats.com/clients/40160/File/kuvujevazozavewos.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/dob9camp5k9ib8ojhan5knlrau/79284739334.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65d654dae9---lupalopetixovim.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/bb57bf0bfffe8e079a3a8600bfd59bea/wizofagerenoromevuw.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/8233e0fda4d5e78e90e2f81821f747be/54909200502.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/62921192346.pdfIn PDF document text
    • http://beergolfers.com./blog/images/file/68645970778.pdfIn PDF document text
    • https://topupdana.com/contents//files/mofewunuwi.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f421326f0---nezefumuporawelosekatibu.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48a7fcf347---44470550924.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/83699324519.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a431d7614eb---wevedaxoxevegasugomekiz.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/14546027076.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ac12b8ba9---82455259256.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/bavorenem.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083073e85614---jekidimexevemow.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/derebobivafipebes.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e445686e87e6906d210a866ce3f684fe/pugepamabodinilenajawi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=everything+giving+me+heartburnPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 10624 bytes
SHA-256: 77b60f71447850a8d20576c4487d00ce2d3d924a8233491b5f61430ca0367cf5
font_01_sfnt_off00011166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11166 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12978 16508 bytes
SHA-256: 056b2e0543ad4aaa9e5296aada37a86473ddf092ae959f78c71aee255914e861